Ouda,S.A. T. 1 2 El-Mesiry and 2M.S. Gaballah( 2007). Increasing Water Use Efficiency for Wheat Grown under Water Stress ConditionsJournal of Applied Sciences Research, 3(12): 1766-1773, 2007
Abstract: Two field experiments were carried out at Shalakan, Kalubia governorate during 2004/05 and 3 2005/06 growing seasons to study the effect of the application of MgCO on increasing water use efficiency of wheat grown under water stress. Five irrigation treatments (control, skipping irrigation at 3 grain milk stage, skipping irrigation at milk stage and the application of MgCO , skipping irrigation at 3 maturity stage, skipping irrigation at grain maturity stage and the application of MgCO ) and two wheat varieties (Sahka 93 and Giza 168) were arranged in spilt plot design with four replications. Results showed that Sakha 93 was more tolerant to water stress than Giza 168, where yield reduction under
skipping irrigation at milk stage where 14.15 and 34.51% for Sahka 93 and Giza 168, respectively. Whereas, skipping irrigation at maturity stage reduce grain yield by 12.86 and 24.25% for Sahka 93 and Giza 168, respectively. The highest water use efficiency was obtained for Sakha 93 and skipping irrigation 3 at grain maturity stage with the application of MgCO . Either air temperature or soil temperature was good predictor for wheat grain yield. However, soil temperature was better predictor than air temperature in predicting straw yield. Therefore, it could be concluded that to save irrigation water, to maintain low yield losses and to increase water use efficiency, the last irrigation could be skipped if Sakha 93 was sown and 3 sprayed with MgCO .
Keywords: (Water use efficiency, wheat, skipping irrigation grain milk stage, skipping irrigation grain maturity stage, MgCO )
